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visits member for 1 year, 11 months
seen 2 days ago

Aug
6
awarded  Yearling
May
20
awarded  Caucus
Nov
13
awarded  Fanatic
Sep
25
comment Is it right to have negative rates?
@Avatar Sorry, my mistake. I intended to direct my ratio comment to Omega not to you.
Sep
25
comment Is it right to have negative rates?
@Avatar I think the English word you are looking for is ratio.
Sep
14
comment Solve $\int \cos^{2n}\theta d\theta$
Your answer is correct. What makes you think it is wrong?
Sep
13
comment What's the probability that the other side of the coin is gold?
@Deedlit. You are right, the analysis would not work in that case. I did mention in an earlier comment that I'm using the symmetry between silver and gold. Removing the double sided silver coin breaks that symmetry.
Sep
13
comment How to prove Cauchy-Schwarz Inequality in $R^3$?
Condition on discriminant should be less than or equal to zero?
Sep
12
answered absolute value inequality
Sep
11
comment What's the probability that the other side of the coin is gold?
He says he randomly grabs a coin and sees that the side facing him is X and asks for the probability of the other side being X. Given the symmetry between silver and gold, it is irrelevant what X is. He happened to pick gold. I think my simple analysis is correct, not just the answer.
Sep
11
answered What's the probability that the other side of the coin is gold?
Sep
8
answered Confusion related to projection
Sep
8
answered For what $z \arcsin(z)$ is real number?
Sep
8
awarded  Editor
Sep
8
revised Probability of getting some kinds of balls
improved clarity of first sentence.
Sep
8
suggested suggested edit on Probability of getting some kinds of balls
Sep
4
awarded  Suffrage
Sep
4
awarded  Vox Populi
Sep
4
comment Integration with using Gauss law
Two questions: 1) Why do you assume E is constant on the surface of the sphere? 2) Why are you integrating to the surface of the sphere when it is E at the center that you seek?
Sep
4
comment Is thickness supposed to affect a box's dimensions?
Is it possible that the problem is poorly worded and the "thickness" was intended to refer to one of the other two dimensions of the box ( besides height)?